NCA563C Years:1948-81 Lower Link Support Pin. Fits Ford Tractors: 8N, NAA, 600, 601, 800, 801, 1801, 2000, 4000 (1948-1964). Row Crop Hi Clearance: 700, 701, 900, 901 (1955-1964), 2000, 3000, 4000 (Without Differential Lock, 1965 -1975), 3600, 4600 (1975-1981).